61564742570 has 16 divisors (see below), whose sum is σ = 110914711560. Its totient is φ = 24604080384.

The previous prime is 61564742543. The next prime is 61564742593. The reversal of 61564742570 is 7524746516.

It can be written as a sum of positive squares in 4 ways, for example, as 46516568329 + 15048174241 = 215677^2 + 122671^2 .

It is a super-3 number, since 3×61564742570³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2715227 + ... + 2737806.

Almost surely, 2^61564742570 is an apocalyptic number.

61564742570 is a deficient number, since it is larger than the sum of its proper divisors (49349968990).

61564742570 is a wasteful number, since it uses less digits than its factorization.

61564742570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454169.

The product of its (nonzero) digits is 1411200, while the sum is 47.

The spelling of 61564742570 in words is "sixty-one billion, five hundred sixty-four million, seven hundred forty-two thousand, five hundred seventy".